We've since described retrotransposons that, while interesting, have both pathogenic and non-pathogenic purposes. The term "junk DNA" in this article dates it;

We've since described retrotransposons that, while interesting, have both pathogenic and non-pathogenic purposes. The term "junk DNA" in this article dates it; we've since found that this junk DNA is full of transposons, retrotransposons, miRNA, siRNA etc..., which is to say they are a great deal more interesting than the "junk" we once thought them to be. The implication in Schizophrenia isn't something I've heard about, but this article is more of a description of how retrotransposons were discovered than anything to do with schizophrenia, although that's just hind-sight.